CN100416282C

CN100416282C - Virtual detector for variable frequency speed regulator

Info

Publication number: CN100416282C
Application number: CNB2004100664865A
Authority: CN
Inventors: 钱匡; 胡新宇; 任海松; 袁颖
Original assignee: SHENYUAN ELECTRIC CO Ltd SHANGHAI
Current assignee: SHENYUAN ELECTRIC CO Ltd SHANGHAI
Priority date: 2004-09-17
Filing date: 2004-09-17
Publication date: 2008-09-03
Anticipated expiration: 2024-09-17
Also published as: CN1749765A

Abstract

The present invention relates to a virtual detector for a speed regulator with variable frequency. The present invention is characterized in that a digital I/O module (1) on a slot of a computer PCI is connected with a detected frequency changer (5) in a two direction way; a multifunction data acquisition card (2) is connected with a signal conditioning module (3) in a two direction way; the signal conditioning module (3) is used for receiving high voltage signals and low voltage signals which come from the detected frequency changer (5); the signal conditioning module (3) is also used for outputting simulating and controlling signals to the detected frequency changer (5) and a direct current power supply (7) with high voltage; end current of the detected frequency changer (5) is input to the signal conditioning module (3) through a sensor (4); the first end of the direct current high-voltage power supply (7) is connected with the detected frequency changer (5); the second end of the direct current power supply (7) with the high voltage is connected with the signal conditioning module (3); the third end of the direct current power supply (7) with the high voltage is connected with a load (6). The present invention is used for replacing the traditional instruments, the price is low, and the price of the present invention is half lower than that of the common measure proposals. The commonality is strong, and the present invention can do the work that a plurality of traditional instruments do. The automatization degree is high, and the work efficiency is improved from three times to five times. The updating and the upgrading of products are convenient.

Description

Virtual detector for variable frequency speed regulator

Technical field

The present invention relates to a kind of variable-frequence governor pick-up unit, relate in particular to a kind of device that detects variable-frequence governor by computer simulation.

Background technology

Along with a large amount of uses of converter technique, every technical indicator of how to test variable-frequence governor is the problem of pendulum in face of the science and technology personnel.

At present, the widely used checkout equipment of variable-frequence governor manufacturer, all by finish many of each measurement function, independently instrument and equipment is formed, the problem that this mode is brought is that the acquisition expenses of equipment is very high, be difficult to realize data sharing between each instrument, the same processing of data and preservation difficulty, automaticity is not high, the upgrading difficulty is difficult to be generalized to other test event or the like; Cause efficient low like this, the repetition rate height.

Such as the original test macro that uses be:

Total system is with 4 in AC reometer, dc voltage table 2,2 of AC voltage tables, 2 in multimeter, safety tester 1 cover;

The processing of data, preservation are adopted and are manually filled in record sheet, are collected the mode of filing keeping by QC;

Whole test process is fully manually finished.

Summary of the invention

The technical issues that need to address of the present invention have provided a kind of virtual detector for variable frequency speed regulator, are intended to address the aforementioned drawbacks.

In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:

The present invention includes a digital I/O module and a multifunctional data acquisition card that is placed on the computer PCI slot, a signal condition module, a sensor, a tested frequency converter, a load; Also comprise a DC high-voltage power supply; Described digital I/O module is connected with tested frequency converter is two-way; Described multifunctional data acquisition card is connected with the signal condition module is two-way; The signal condition module receives high pressure and the low-voltage signal from tested frequency converter, and analog control signal is exported to tested frequency converter and DC high-voltage power supply; The end electric current of described tested frequency converter is input to the signal condition module by sensor; One end of described DC high-voltage power supply is connected with tested frequency converter, and second end is connected with the signal condition module, and the 3rd end is connected with load.

Compared with prior art, the invention has the beneficial effects as follows: existing computer technology and flexibly easy-to-use software and modularized hardware are combined, be used for substituting the function of traditional instrument, and cheap: be below 1/2 of common measurement scheme; Highly versatile: an equipment can push up some equipment and use; The automaticity height: work efficiency improves 3～5 times; Upgrading is convenient; Following table is prior art and passes through the table of comparisons of the present invention:

	Test duration	Operating personnel	Test event	Efficient
	Test duration	Operating personnel	Test event	Efficient	The manual testing system	15 minutes	2 people	26	1
The present invention	12 minutes	1 people	35	3.37	The manual testing system	15 minutes	2 people	26	1

Description of drawings

Fig. 1 is a system chart of the present invention;

Fig. 2 is the block diagram of DC high-voltage power supply among Fig. 1;

Fig. 3 is the concrete wiring diagram of Fig. 1;

Fig. 4 is a test flow chart of the present invention;

Embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

By Fig. 1, Fig. 2, Fig. 3 as seen: the present invention includes digital I/

O module

1 and 5, one loads 6 of 4, one tested frequency converters of 3, one sensors of 2, one signal condition modules of multifunctional data acquisition card that are placed on the computer PCI slot; Also comprise a DC high-voltage power supply 7; Described digital I/O module 1 and tested 5 two-way connections of frequency converter; Described multifunctional data acquisition card 2 and 3 two-way connections of signal condition module; Signal condition module 3 receives high pressure and the low-voltage signal from tested frequency converter 5, and analog control signal is exported to tested frequency converter 5 and DC high-voltage power supply 7; The end electric current of described tested frequency converter 5 is input to signal condition module 3 by sensor 4; One end of described DC high-voltage power supply 7 is connected with tested frequency converter 5, and second end is connected with signal condition module 3, and the 3rd end is connected with load 6;

Described DC high-voltage power supply 7 comprises frequency converter 71, wave filter 72,1:3 transformer 73, rectifier bridge 74; Described frequency converter 71, wave filter 72,1:3 transformer 73, rectifier bridge 74 are linked in sequence;

Described multifunctional data acquisition card 2 is connected with printer 8, with output data;

Below principle of the present invention is described as follows:

The digital I/O module and the multifunctional data acquisition card that are inserted on the computer PCI slot are to be used for gathering and output signal:

Numeral I/O module is used for gathering and the output digital signal, this part signal will be used to control the PLC port of control contactor such as tested frequency converter input and output and tested frequency converter self etc., and with this grasp tested frequency converter running status, the tested frequency converter of control start and stop and send the part steering order to tested frequency converter;

Simulation and digital signal be gathered and be exported to multifunctional data acquisition card can by the signal condition module, be used to control the simulating signal of the aanalogvoltage current input terminal etc. of tested frequency converter, and all the high-low pressure simulating signals relevant with tested frequency converter performance evaluation that can gather the output of tested frequency converter are (as frequency converter input and output terminal voltage, analog output voltage, DC bus-bar voltage etc.); The input/output terminal electric current of tested frequency converter, then convert voltage signal to by sensor after, send into the signal condition module and handle;

The analog control signal of DC high-voltage power supply is also sent by the signal condition module, and the DC voltage of its output changes with the height of control signal, and its range of adjustment is 0～900v; The direct current that DC high-voltage power supply is sent, one is used in the DC test added DC voltage on the PN terminal; Second be used as in the alternating-current measurement voltage source that applies on the field coil; The magnitude of voltage of the output of DC high-voltage power supply also is admitted to the signal condition module, monitors where necessary;

Need bringing onto load to test in the alternating-current measurement, motor is connected on tested inverter output terminal as load, and change the load size of motor by the exciting current of DC high-voltage power supply change motor;

All signals all by the test procedure control (by shown in Figure 4) of operation on computers, carry out calculation process with gathering the signal of coming in, and export tested frequency converter of various signal controlling and whole testing process.

Printer interface is made the usefulness of data output on computers;

The dc high-voltage source circuit comprises one in 0.4 kilowatt of frequency converter, one in wave filter, one in 1:3 transformer, one of rectifier bridge.

Tested frequency converter needs external 220v power frequency supply, by the output module SCXI-1325 (product of NI) that is connected on the signal conditioner, send the direct current (magnitude of voltage is by programmed control) of 0～10v, receive on the sub-v2 of tested frequency converter analog voltage input, control the output voltage of tested frequency converter, and, filter sinusoidal wave via the pulse-width modulation waveform of wave filter with tested frequency converter output, boost by transformer then, will exchange electrofiltration by wave filter at last and become direct current output.

Claims

1. virtual detector for variable frequency speed regulator, comprise a digital I/O module (1) and a multifunctional data acquisition card (2) that is placed on the computer PCI slot, a signal condition module (3), a sensor (4), a tested frequency converter (5), a load (6); It is characterized in that: also comprise a DC high-voltage power supply (7); Described digital I/O module (1) and two-way connection of tested frequency converter (5); Described multifunctional data acquisition card (2) and two-way connection of signal condition module (3); Signal condition module (3) receives high pressure and the low-voltage signal from tested frequency converter (5), and analog control signal is exported to tested frequency converter (5) and DC high-voltage power supply (7); The end electric current of described tested frequency converter (5) is input to signal condition module (3) by sensor (4); One end of described DC high-voltage power supply (7) is connected with tested frequency converter (5), and second end is connected with signal condition module (3), and the 3rd end is connected with load (6).

2. virtual detector for variable frequency speed regulator according to claim 1 is characterized in that: described DC high-voltage power supply (7) comprises frequency converter (71), wave filter (72), 1:3 transformer (73), rectifier bridge (74); Described frequency converter (71), wave filter (72), 1:3 transformer (73), rectifier bridge (74) are linked in sequence.

3. virtual detector for variable frequency speed regulator according to claim 1 and 2 is characterized in that: described multifunctional data acquisition card (2) is connected with printer (8), with output data.